Original Verse:
Proverbs Chapter 17 Verse 28Even a fool, when he holdeth his peace, is counted wise: and he that shutteth his lips is esteemed a man of understanding.

Reference Verses:
Job Chapter 13 Verse 5O that ye would altogether hold your peace! and it should be your wisdom.
Proverbs Chapter 15 Verse 2The tongue of the wise useth knowledge aright: but the mouth of fools poureth out foolishness.
Ecclesiastes Chapter 10 Verse 3Yea also, when he that is a fool walketh by the way, his wisdom faileth him, and he saith to every one that he is a fool.
Ecclesiastes Chapter 10 Verse 14A fool also is full of words: a man cannot tell what shall be; and what shall be after him, who can tell him?
Ecclesiastes Chapter 5 Verse 3For a dream cometh through the multitude of business; and a fool's voice is known by multitude of words.